The falsy part of any/unknown is any/unknown (#39529)

andrewbranch · web-flow · commit dbab46c363fb · 2020-08-18T11:06:44.000-07:00
diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
@@ -18652,7 +18652,7 @@ namespace ts {
                 type.flags & TypeFlags.BigInt ? zeroBigIntType :
                 type === regularFalseType ||
                 type === falseType ||
-                type.flags & (TypeFlags.Void | TypeFlags.Undefined | TypeFlags.Null) ||
+                type.flags & (TypeFlags.Void | TypeFlags.Undefined | TypeFlags.Null | TypeFlags.AnyOrUnknown) ||
                 type.flags & TypeFlags.StringLiteral && (<StringLiteralType>type).value === "" ||
                 type.flags & TypeFlags.NumberLiteral && (<NumberLiteralType>type).value === 0 ||
                 type.flags & TypeFlags.BigIntLiteral && isZeroBigInt(<BigIntLiteralType>type) ? type :
diff --git a/tests/baselines/reference/anyAndUnknownHaveFalsyComponents.js b/tests/baselines/reference/anyAndUnknownHaveFalsyComponents.js
@@ -0,0 +1,54 @@
+//// [anyAndUnknownHaveFalsyComponents.ts]
+declare let x1: any;
+const y1 = x1 && 3;
+
+// #39113
+declare let isTreeHeader1: any;
+function foo1() {
+  return {
+    display: "block",
+    ...(isTreeHeader1 && {
+      display: "flex",
+    })
+  };
+}
+
+declare let x2: unknown;
+const y2 = x2 && 3;
+
+// #39113
+declare let isTreeHeader2: unknown;
+function foo2() {
+  return {
+    display: "block",
+    ...(isTreeHeader1 && {
+      display: "flex",
+    })
+  };
+}
+
+
+//// [anyAndUnknownHaveFalsyComponents.js]
+var __assign = (this && this.__assign) || function () {
+    __assign = Object.assign || function(t) {
+        for (var s, i = 1, n = arguments.length; i < n; i++) {
+            s = arguments[i];
+            for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p))
+                t[p] = s[p];
+        }
+        return t;
+    };
+    return __assign.apply(this, arguments);
+};
+var y1 = x1 && 3;
+function foo1() {
+    return __assign({ display: "block" }, (isTreeHeader1 && {
+        display: "flex"
+    }));
+}
+var y2 = x2 && 3;
+function foo2() {
+    return __assign({ display: "block" }, (isTreeHeader1 && {
+        display: "flex"
+    }));
+}
diff --git a/tests/baselines/reference/anyAndUnknownHaveFalsyComponents.symbols b/tests/baselines/reference/anyAndUnknownHaveFalsyComponents.symbols
@@ -0,0 +1,57 @@
+=== tests/cases/compiler/anyAndUnknownHaveFalsyComponents.ts ===
+declare let x1: any;
+>x1 : Symbol(x1, Decl(anyAndUnknownHaveFalsyComponents.ts, 0, 11))
+
+const y1 = x1 && 3;
+>y1 : Symbol(y1, Decl(anyAndUnknownHaveFalsyComponents.ts, 1, 5))
+>x1 : Symbol(x1, Decl(anyAndUnknownHaveFalsyComponents.ts, 0, 11))
+
+// #39113
+declare let isTreeHeader1: any;
+>isTreeHeader1 : Symbol(isTreeHeader1, Decl(anyAndUnknownHaveFalsyComponents.ts, 4, 11))
+
+function foo1() {
+>foo1 : Symbol(foo1, Decl(anyAndUnknownHaveFalsyComponents.ts, 4, 31))
+
+  return {
+    display: "block",
+>display : Symbol(display, Decl(anyAndUnknownHaveFalsyComponents.ts, 6, 10))
+
+    ...(isTreeHeader1 && {
+>isTreeHeader1 : Symbol(isTreeHeader1, Decl(anyAndUnknownHaveFalsyComponents.ts, 4, 11))
+
+      display: "flex",
+>display : Symbol(display, Decl(anyAndUnknownHaveFalsyComponents.ts, 8, 26))
+
+    })
+  };
+}
+
+declare let x2: unknown;
+>x2 : Symbol(x2, Decl(anyAndUnknownHaveFalsyComponents.ts, 14, 11))
+
+const y2 = x2 && 3;
+>y2 : Symbol(y2, Decl(anyAndUnknownHaveFalsyComponents.ts, 15, 5))
+>x2 : Symbol(x2, Decl(anyAndUnknownHaveFalsyComponents.ts, 14, 11))
+
+// #39113
+declare let isTreeHeader2: unknown;
+>isTreeHeader2 : Symbol(isTreeHeader2, Decl(anyAndUnknownHaveFalsyComponents.ts, 18, 11))
+
+function foo2() {
+>foo2 : Symbol(foo2, Decl(anyAndUnknownHaveFalsyComponents.ts, 18, 35))
+
+  return {
+    display: "block",
+>display : Symbol(display, Decl(anyAndUnknownHaveFalsyComponents.ts, 20, 10))
+
+    ...(isTreeHeader1 && {
+>isTreeHeader1 : Symbol(isTreeHeader1, Decl(anyAndUnknownHaveFalsyComponents.ts, 4, 11))
+
+      display: "flex",
+>display : Symbol(display, Decl(anyAndUnknownHaveFalsyComponents.ts, 22, 26))
+
+    })
+  };
+}
+
diff --git a/tests/baselines/reference/anyAndUnknownHaveFalsyComponents.types b/tests/baselines/reference/anyAndUnknownHaveFalsyComponents.types
@@ -0,0 +1,75 @@
+=== tests/cases/compiler/anyAndUnknownHaveFalsyComponents.ts ===
+declare let x1: any;
+>x1 : any
+
+const y1 = x1 && 3;
+>y1 : any
+>x1 && 3 : any
+>x1 : any
+>3 : 3
+
+// #39113
+declare let isTreeHeader1: any;
+>isTreeHeader1 : any
+
+function foo1() {
+>foo1 : () => any
+
+  return {
+>{    display: "block",    ...(isTreeHeader1 && {      display: "flex",    })  } : any
+
+    display: "block",
+>display : string
+>"block" : "block"
+
+    ...(isTreeHeader1 && {
+>(isTreeHeader1 && {      display: "flex",    }) : any
+>isTreeHeader1 && {      display: "flex",    } : any
+>isTreeHeader1 : any
+>{      display: "flex",    } : { display: string; }
+
+      display: "flex",
+>display : string
+>"flex" : "flex"
+
+    })
+  };
+}
+
+declare let x2: unknown;
+>x2 : unknown
+
+const y2 = x2 && 3;
+>y2 : unknown
+>x2 && 3 : unknown
+>x2 : unknown
+>3 : 3
+
+// #39113
+declare let isTreeHeader2: unknown;
+>isTreeHeader2 : unknown
+
+function foo2() {
+>foo2 : () => any
+
+  return {
+>{    display: "block",    ...(isTreeHeader1 && {      display: "flex",    })  } : any
+
+    display: "block",
+>display : string
+>"block" : "block"
+
+    ...(isTreeHeader1 && {
+>(isTreeHeader1 && {      display: "flex",    }) : any
+>isTreeHeader1 && {      display: "flex",    } : any
+>isTreeHeader1 : any
+>{      display: "flex",    } : { display: string; }
+
+      display: "flex",
+>display : string
+>"flex" : "flex"
+
+    })
+  };
+}
+
diff --git a/tests/baselines/reference/contextualExpressionTypecheckingDoesntBlowStack.types b/tests/baselines/reference/contextualExpressionTypecheckingDoesntBlowStack.types
@@ -59,7 +59,7 @@ export default class Operation {
 >name : any
 
             if(innerResult && innerResult.length > 0) {
->innerResult && innerResult.length > 0 : boolean
+>innerResult && innerResult.length > 0 : any
 >innerResult : any
 >innerResult.length > 0 : boolean
 >innerResult.length : any
diff --git a/tests/baselines/reference/controlFlowCaching.types b/tests/baselines/reference/controlFlowCaching.types
@@ -539,8 +539,8 @@ function f(dim, offsets, arr, acommon, centerAnchorLimit, g, has, lin) {
 >titleRotation = (taTitleOrientation && taTitleOrientation == "away") ? 180 : 0 : 0 | 180
 >titleRotation : number
 >(taTitleOrientation && taTitleOrientation == "away") ? 180 : 0 : 0 | 180
->(taTitleOrientation && taTitleOrientation == "away") : boolean
->taTitleOrientation && taTitleOrientation == "away" : boolean
+>(taTitleOrientation && taTitleOrientation == "away") : any
+>taTitleOrientation && taTitleOrientation == "away" : any
 >taTitleOrientation : any
 >taTitleOrientation == "away" : boolean
 >taTitleOrientation : any
diff --git a/tests/baselines/reference/narrowingTruthyObject.types b/tests/baselines/reference/narrowingTruthyObject.types
@@ -31,7 +31,7 @@ function foo(x: unknown, b: boolean) {
 >toString : () => string
     }
     if (x && typeof x === 'object') {
->x && typeof x === 'object' : boolean
+>x && typeof x === 'object' : unknown
 >x : unknown
 >typeof x === 'object' : boolean
 >typeof x : "string" | "number" | "bigint" | "boolean" | "symbol" | "undefined" | "object" | "function"
@@ -45,7 +45,7 @@ function foo(x: unknown, b: boolean) {
 >toString : () => string
     }
     if (b && x && typeof x === 'object') {
->b && x && typeof x === 'object' : boolean
+>b && x && typeof x === 'object' : unknown
 >b && x : unknown
 >b : boolean
 >x : unknown
@@ -61,8 +61,8 @@ function foo(x: unknown, b: boolean) {
 >toString : () => string
     }
     if (x && b && typeof x === 'object') {
->x && b && typeof x === 'object' : boolean
->x && b : boolean
+>x && b && typeof x === 'object' : unknown
+>x && b : unknown
 >x : unknown
 >b : boolean
 >typeof x === 'object' : boolean
@@ -77,9 +77,9 @@ function foo(x: unknown, b: boolean) {
 >toString : () => string
     }
     if (x && b && b && typeof x === 'object') {
->x && b && b && typeof x === 'object' : boolean
->x && b && b : boolean
->x && b : boolean
+>x && b && b && typeof x === 'object' : unknown
+>x && b && b : unknown
+>x && b : unknown
 >x : unknown
 >b : boolean
 >b : true
@@ -95,9 +95,9 @@ function foo(x: unknown, b: boolean) {
 >toString : () => string
     }
     if (b && b && x && b && b && typeof x === 'object') {
->b && b && x && b && b && typeof x === 'object' : boolean
->b && b && x && b && b : true
->b && b && x && b : true
+>b && b && x && b && b && typeof x === 'object' : unknown
+>b && b && x && b && b : unknown
+>b && b && x && b : unknown
 >b && b && x : unknown
 >b && b : boolean
 >b : boolean
@@ -125,8 +125,8 @@ function f1(x: unknown): any {
 >x : unknown
 
     return x && typeof x === 'object' && x.hasOwnProperty('x');
->x && typeof x === 'object' && x.hasOwnProperty('x') : boolean
->x && typeof x === 'object' : boolean
+>x && typeof x === 'object' && x.hasOwnProperty('x') : unknown
+>x && typeof x === 'object' : unknown
 >x : unknown
 >typeof x === 'object' : boolean
 >typeof x : "string" | "number" | "bigint" | "boolean" | "symbol" | "undefined" | "object" | "function"
diff --git a/tests/cases/compiler/anyAndUnknownHaveFalsyComponents.ts b/tests/cases/compiler/anyAndUnknownHaveFalsyComponents.ts
@@ -0,0 +1,29 @@
+// @strictNullChecks: true
+
+declare let x1: any;
+const y1 = x1 && 3;
+
+// #39113
+declare let isTreeHeader1: any;
+function foo1() {
+  return {
+    display: "block",
+    ...(isTreeHeader1 && {
+      display: "flex",
+    })
+  };
+}
+
+declare let x2: unknown;
+const y2 = x2 && 3;
+
+// #39113
+declare let isTreeHeader2: unknown;
+function foo2() {
+  return {
+    display: "block",
+    ...(isTreeHeader1 && {
+      display: "flex",
+    })
+  };
+}
